What are the advantages and disadvantages of vacuum complex prototype

In the prototype industry, vacuum compound molding is a common processing method, mainly used for customization of small batches of plastic prototypes, the average quantity is dozens to hundreds of plastic prototypes, and it is more cost-effective to process them by vacuum re-molding. However, customers with very high requirements for the appearance and accuracy of the prototype will not use vacuum re-molding. Why do these two different situations occur, mainly because the vacuum compound mold prototype has its advantages and disadvantages. Let's introduce it in detail.

video of prototype production of vacuum complex model

vacuum complex prototype disadvantages:

1. Shrink and easy to deform. Since the vacuum compound mold uses the principle of thermal expansion and cold contraction, if we prototype according to the size above the customer's drawings, after the liquid cooling in the silicone mold, it is bound to shrink some, resulting in deformation. Generally, the vacuum mold is used to make the prototype. When making the silicone mold, it should be done bigger than the size above. Even so, the prototype error of the vacuum complex is still relatively large, usually at 0. 2mm or even bigger.

2. The high temperature resistance is low. Since the material of the vacuum compound mold is liquid, it is cooled after high temperature heating, therefore, in terms of performance, it is not as good as that directly processed on the plate. Usually, the prototype processed by CNC can reach about 100 degrees in terms of high temperature resistance, while the prototype of vacuum re-molded can only withstand high temperature of about 60 degrees. In addition, the prototype of vacuum re-molded is not as convenient as the prototype of CNC machining in strength and hardness.

Advantages of vacuum compound mold:

As the saying goes' Junjun covers a hundred ugly' , Although there are so many disadvantages to the prototype of vacuum re-molded, it is cheap. Usually, CNC Machining requires a prototype of several hundred yuan, and it takes only a few tens of yuan to adopt a vacuum complex mold, so there are still many people with insufficient funds who are willing to use this method to process.

to sum up, the prototype of vacuum re-molded has the disadvantages of shrinkage, easy deformation and poor performance, and its advantage is that the price is cheap.

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